107 entries under tough topic. ×

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fierce(adjective, hard, harsh, cruel)
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fine-grained(hard, solid, rigid, inflexible)
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heavy(hard, solid, rigid, inflexible)
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murderous(adjective, hard, harsh, cruel)
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nonporous(hard, solid, rigid, inflexible)
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sanguinary(adjective, hard, harsh, cruel)
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tyrannical(adjective, hard, harsh, cruel)
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APASmart Define. (2016). hardened thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hardened/thesaurus/synonyms
ChicagoSmart Define. 2016. "hardened thesaurus" https://smartdefine.org/hardened/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, hardened thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hardened/thesaurus/synonyms>.
MLASmart Define. "hardened thesaurus" 29 March 2016. Web. 30 September 2026. <https://smartdefine.org/hardened/thesaurus/synonyms>